# Amendment and Establishment of Area Navigation (RNAV) Routes T-354, and T-421; Eastern United States
> **Rule** · Final rule. · Published 2022-04-27 · Effective 2022-07-14 · 87 FR 24862
## Document
- **Document number:** 2022-08894
- **Category:** other
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 87 FR 24862
- **Publication date:** 2022-04-27
- **Effective date:** 2022-07-14
- **FAA docket:** Docket No. FAA-2021-0914
## Abstract

This action amends area navigation (RNAV) route T-354, and establishes RNAV route T-421 in the eastern United States. The changes to the routes expand the availability of RNAV routing in support of transitioning the National Airspace System (NAS) from ground-based to satellite-based navigation.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2022/04/27/2022-08894/amendment-and-establishment-of-area-navigation-rnav-routes-t-354-and-t-421-eastern-united-states)
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